This keycaps are made of PBT.XDA is little higher than DSA,little lower than SA.
3U for Filco Minila
4.5U for Filco 104 Japan Edition
5.5U for Noppoo 84
6U for Cherry 1865/1869(Can't support Razer Blackwidow,Logitech)
6.5U for Corsair K70 K95 Etc
If some keys missing or broken on the way,just leave us message,we will send you missing or broken ones soon.Don't worry about it and don't leave feedback immediately.